87C51FA PHILIPS

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Technical content

Philips Semiconductors Product specification 87C51FA/87C51FBCMOS single-chip 8-bit microcontrollers 3-611996 Aug 16 853–1692 17199

DESCRIPTION

The 87C51FA and 87C51FB Single-Chip 8-Bit Microcontrollers are manufactured in an advanced CMOS process and are derivatives of the 80C51 microcontroller family. The 87C51FA/FB has the same instruction set as the 80C51. This device provides architectural enhancements that make it applicable in a variety of applications for general control systems. The 87C51FA contains 8k × 8 memory, and the 87C51FB contains 16k × 8 memory. They both contain a volatile 256 × 8 read/write data memory, four 8-bit I/O ports, three 16-bit timer/event counters, a Programmable Counter Array (PCA), a multi-source, two-priority-level, nested interrupt structure, an enhanced UART and on-chip oscillator and timing circuits. For systems that require extra capability, the 87C51FA/FB can be expanded using standard TTL compatible memories and logic. Its added features make it an even more powerful microcontroller for applications that require pulse width modulation, high-speed I/O and up/down counting capabilities such as motor control. It also has a more versatile serial channel that facilitates multiprocessor communications. See 83C51FA/83C51FB/83C51FC/80C51FA datasheet for ROM and ROMless devices.

FEATURES

  • 80C51 central processing unit
  • 87C51FA: 8k × 8 EPROM 87C51FB: 16k × 8 EPROM – expandable externally to 64k bytes – Quick Pulse programming algorithm – Two level program security system
  • 256 × 8 RAM, expandable externally to 64k bytes
  • Three 16-bit timer/counters – T2 is an up/down counter
  • Programmable Counter Array (PCA) – High speed output – Capture/compare – Pulse Width Modulator – Watchdog Timer
  • Four 8-bit I/O ports
  • Full-duplex enhanced UART – Framing error detection – Automatic address recognition
  • Power control modes – Idle mode – Power-down mode
  • Once (On Circuit Emulation) Mode
  • Five package styles
  • OTP package available PIN CONFIGURATIONS 20 21 40T2/P1.0 T2EX/P1.1 ECI/P1.2 CEX0/P1.3 CEX1/P1.4 CEX2/P1.5 CEX3/P1.6 RST RxD/P3.0 TxD/P3.1 INT0/P3.2 INT1/P3.3 T0/P3.4 T1/P3.5 CEX4/P1.7 WR /P3.6 RD /P3.7 XTAL2 XTAL1 VSS P2.0/A8 P2.1/A9 P2.2/A10 P2.3/A11 P2.4/A12 P2.5/A13 P2.6/A14 P2.7/A15 PSEN ALE EA P0.7/AD7 P0.6/AD6 P0.5/AD5 P0.4/AD4 P0.3/AD3 P0.2/AD2 P0.1/AD1 P0.0/AD0 V CC DUAL IN-LINE PACKAGE SU00714A